1 destruction, damage, wrecking, impairment:
Enemy infiltrators were responsible for the sabotage of our radar.
2 subversion, treachery, treason:
When the radar was found damaged, sabotage was suspected.
3 undermine, subvert, disrupt, spoil, ruin, cripple; damage, incapacitate, disable, destroy, wreck, Colloq Brit throw a spanner in(to) the works, US throw a monkey wrench into the machinery, Slang Brit queer (someone's pitch):
Only someone who had something to lose would have sabotaged our plan for reorganization. The engine had been sabotaged by pouring sand into the fuel tank.